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Roller for rolling large profile steel and manufacturing technology of roller

A type of steel and roll technology, applied in the field of roll and its production process, can solve the problems of less grinding times, large hardness drop, and low rolling volume, and achieve smooth and bright surface of the rolled piece, strong thermal fatigue resistance, and high hardness. even drop effect

Active Publication Date: 2013-10-09
江苏凯达重工股份有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The rolls used for rolling large-scale steel (such as large I-beam, channel steel, U-shaped mine steel, sheet pile steel, angle steel, heavy rail finished frame, etc.) , Large drop in hardness, low rolling capacity, few grinding times, poor strength, prone to roll breakage accidents
There are also rolls using AD180 semi-steel. Because the hardness is between 50-55 degrees, the uneven wear often produces small bumps in the pass during rolling, which affects the service life. The surface finish of steel is rough, which cannot meet the market demand

Method used

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  • Roller for rolling large profile steel and manufacturing technology of roller

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Embodiment 1）

[0018] See figure 1 , The roll used for rolling large section steel in this embodiment contains evenly distributed spherical graphite in the matrix, and the matrix structure is granular carbide, tempered sorbite, and pearlite.

[0019] The drop between the roller surface and the bottom of the deep hole is ≦0.5~1.5 degrees, and the hardness drop is small and uniform. The tensile strength of the roll neck is ≧550MPa.

[0020] When rolling large section steel, the fine graphite is crushed under the action of extrusion and heat, and it can act as a lubricant when the rolled material is pierced to solve the problem of sticking steel, and the surface of the rolled piece is smooth and shiny.

[0021] The production technology of the roll that is used for rolling large section steel of the present embodiment comprises the following steps:

[0022] ①Heat 80-100°C on the basis of the liquidus temperature of the semi-steel, add 0.03% aluminum, and calm down for more than 10 minutes to ...

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Abstract

The invention discloses a roller for rolling large profile steel and a manufacturing technology of the roller. A base body of the roller for rolling the large profile steel contains evenly-distributed spheroidal graphite, and the base body is composed of granulous carbide, tempered sorbite and pearlite. When the roller for rolling the large profile steel rolls the large profile steel, the small graphite is crashed under the effect of squeezing, heating and the like, the effect of lubricant can be achieved during rolling material hole punching, the problem of steel sticking is solved, and the surface of a rolled piece is bright and clean.

Description

technical field [0001] The invention relates to a roll for rolling large section steel and its production process. Background technique [0002] The rolls used for rolling large-scale steel (such as large I-beam, channel steel, U-shaped mine steel, sheet pile steel, angle steel, heavy rail finished frame, etc.) , Large drop in hardness, low rolling volume, few grinding times, poor strength, prone to roll breakage accidents. There are also rolls using AD180 semi-steel. Because the hardness is between 50-55 degrees, the uneven wear often produces small bumps in the pass during rolling, which affects the service life. The surface finish of the steel is rough, which cannot meet the market demand. Contents of the invention [0003] The first object of the present invention is to provide a roll for rolling large section steel with extremely high strength, wear resistance and thermal fatigue resistance, and long service life. [0004] The technical solution to realize the firs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B27/02C22C33/08
Inventor 许健周国祥蒋志芳
Owner 江苏凯达重工股份有限公司
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